Even better, I would like someone produces some bulk "slitter-loader", maybe an artisanal one.
The idea being, a 126 cartridge could be made in iron or plastic and reused forever.
One would put the bulk film in the bulk slitter-loader, and the apparatus does the slitting and loading work in a "transparent" way.
One could buy slitter-loader and reusable cartridges for 126 and not rely on special production bulks.

A different slitter-loader could be devised for APS, 110 etc.